Back-pressure floor drain



.Mil'ch .19, 1929. E, w, BQQSEY 1,705,469

BACK PRESSURE FLOOR DRAIN Filed Aug. 20, 1928 2 Sheets$heet 1 I N VEN TOR.

[an 4,90 MAG 04a A TTORNE Y.

March 19, 1929. E w, BOQSEY 1,705,469

' BACK PRESSURE FLOOR DRAIN Filed Ai1g .20, 1928 2 Shets-Sheet 2 IN VEN TOR.

[wmew 1 Arm Patented Mar. '19, 1929.

s'rs

EDWARD W. n. BOOSEY, or nrrrnorr, M cnIGAN.

BACK-PRESSURE FLOOR DRAIN.

'A-pplication filed August 20, 1928. serial no. 300,915.

This invention relates to back. pressure floor drain and the object of the invention is to provide parts for a drainwhich may be fitted into the hub of an ordinary drain pipe and will act efficiently as a drain and as a check preventing back water from backing up through the drain. q p

Another object of the invention is to provide a back pressure floor drain of the character described in which all of the parts are readily accessible or removable for replacement or repair.

A further object of the invention is to provide a back pressure floor drain which will allow access to the interior of the drain pipe for cleanout purposes and which is equipped to allow the drain to be readily flushed with an ordinary hose when desired.

A further object of the invention is to pro vide a back pressure floor drain including a swing check valve for preventing back water from backing up through the drain, thesaid swing check valve being removable in its entirety from the drain for inspection, replacement or repa1r without disarranging the other parts of the floor drain.

drain pipe 1 having a hub 2 providing a shoulder 8. Ahubbed drain pipe of this type is standard and isv carried in stock by most plumbers. A substantially cup shaped member 4 is positioned on the shoulder 3 and is provided with a series oflugs 5 which are embedded in the caulklng 6 between the member 4 and the hub 2 which holds the member 4 in place. At the upper edge, the member 4 is provided with a series'of notches 7 and the caulking is carried up to the. bottom of these notches so that any drainage-passing onto the caulking will pass through the notches 7 into the interior of the member 4. A

perforated drain plate 8 is positioned on the v upper edge of the member 4 and extends back pressure.

linely therebeneath.

flush with the upper edg of the hub 2, and the hub may be embedded in a concrete floor as shown, which extends flush with the upper edge of they hub 2. As shown in Figs-2 and 3, the member 4 is provided with two apertures 9 and 10 in the bottom. A plug 11 is threaded into the aperture 9 andmay be removed for cleaning' out the drain pipe 1. i

This plug 11 is provided with a square boss 12 to which a wrench may be applied for its removal, and a machine screw 13 extends through the drain plate 8 and is threaded into the plug 11. This screw 13 secures the drain plate and member 4 together andv holds the drain plate in place in the hub 2. i

A valve body is threaded into the threaded aperture 10 in the bottom of the'member4 and is-provided with four lugs1'5, as shown in Figs. 2 and 3, to which a wrench may be applied to thread or unthread the valve member4 into or out of the threaded aperture 10.

This valve body is formed with a portion of smaller diameter opening therefrom from' one side of the center forming a conduit 16 having a sloping bottom and the conduit ternnnates in an opening 17 extendingin a vertical plane. A rib 18 is cast integrally" with the valve body directly over the openmg 17 and an arm 19 is pivotally mounted at 2Q on the rib 18. circular valve 21 is prov1ded,hav1ng a boss 22 which is apertured to receive the arm 19, and a set screw 28 is provlded for securmgthe arm 19 in the boss 22. By this arrangement, the valve 21 norm'ally'seatsby gravity on the end of the conduit16 and prevents back water. from passmg upwardly throughthe said conduit and at the same time allows "drainage to flow downwardly-through the conduit 16 opening the swing check valve and passing to the interior of thedrain pipe 1. As shown in Figs. 1 and 2, the drain plate 8 is provided with an aperture 24, and a-plug 25 is positioned in this aperture and is provided with drainage apertures 26 in the bottom and with a rib 27 by means of which the plug 25 maybe lifted out of the aperture 24. The plug 25 is provided with a flange 28 which seats on a companion face provided about the aperture 24 in the drain plate 8. This plug 25 may be readily removed to allow insertion of an ordi- I nary hose for washing out the interior of the swing check valve wh ch is The swin check valve is also so constructed that the valve 21 and arm-1 9 and the boss positioned direct- 22 and set screw 23 are within the outer diameter of 'flange 14-, .so that the valve body, including the swing check valve, may be unthreaded and withdrawn through the aperture for inspection 'or-repair without disturbing the member 4 and caulking in which the said member is set. This swing check valve ma also be readi-l re laced the entirevalve may be readily inserted through the aperture 10 and may be secured to the member 4 threading, as shown, :or inany othersuitable manner. 7

When it is desired to flush thezentire drain,

or to clean out thedrain pipe 1,.the screw'13 may beremoved to allow removal of the dra-in plate 8, at which time, the plug 11 may be 'unthreaded from the member l to allow .ac-

\cess to the drain pipe l for clean-out purposes, Due to the sloping bottom of the conduit l6 leadingtoward thes-wing check Malve 21, it is impossible for dirt or vforeign unatter .-to accumulate Within the swing check valve and thus the water fiowiing through. the swing check valve will keep the conduit cleainand, at :thesame time, the swing check valve will automatically prevent back-Water from backing up through the drain.

From the foregoing description, it becomes evident that the device :is very simple and eflicient in operation, will not :easily get out of order, may be readily cleaned outat any time, will ,prevent water from backing up pthrou'gh the drain and provides a device "iback water from backing up through the" which accomplishes the objects described.

Having thus fully described any invention, its utility and anode of operation, what I claim and desire @LO :secu're by Letters Patent of the Unit-edStates is 1. A back pressure floor drain comprising a drain pipe havingan *enlarged hub fat the upper end and formingan annular shoulder,

a substantially cup-shaped anember seating draima. drain pla'te posit ioned ontlie'notched upper edge" of the cup-sh apedmembemn d e2;- tending flush with-the end o'f the hub,-a screw extending through the drain plate and threaded into the clean-out plug and a ie movable plug moun'tedin *the'drain plate directly over saidswing check valve.

2. A back pressure floor drain comprising a drain pipe having an enlarged hub at the upper end forming an annular shoulder, a substantially cup-shaped member seating on "said shoulder and 'catulked in position thereon, the upper edge of said cup-shaped member being provided with notches above the caulking, a drain plate resting on said notched edge and extending flush with the hub end of the drain pipe, said cup-shaped member being provided with :a pair of apertures in the bottom open to the interior :of the drain pipe, aclean-out :plug secured in onesoif said apertures, a screw extending through the drain plate and threaded into the clean-out plug, a swing checkjvalve *bodlysecured inthe other aperture and having a c'onduitopening therefrom into the interiorof "the drain pipe, the saidicondi'iit having aslopingbo'tto'm and a-swingoheok valve pivotallyimountedon said' valve body and normally closing said eonduit by gravity, the swing check valve and conduit being freely movable through the opening in which said valve body is secured.

8. A back pressure floor "drain comprising a drain pipe having an enlarged hub at the upper end forming an annular shoulder, a substantially cup-shaped member seating on said shoulder and secured in position the're'on, said cup-shaped member being provided with a pairo'fapertures in the bottom, a clean-out plug secured -lIl one aperture, a swing cheek valve including a valve body having a portion of large diameter secured in the' other' aperture, a. conduitopen'ing therefrom at one side of the center thereof and "having a sloping bottom, a swing check valve pivotally P mounted *on said -bodyand normally closing the discharge end-of said conduit by gravity,

the conduit and swing check valve being freely movable through 'the aperture for the port-ion "(if Fthe *valve body of large diameter,

a drain plate mounted on the upperedge of.

saidcLup-shaped member and extendingflush with the upper edge of said hub and a removable p'lug in the drain plate directly over said swing check valve.

4;. A back pressure floor drain comprising a hubbed drain pipe, a cup-shaped member fitting within the hubbed ;por'tion-ofthedrain pipe and cau'lked in'position therein, the-upper edge or said cup-shaped member being provided with -1'1otches,ia drain plate resting on said notched upper 'edge and extending flush with the 'hubbed end of said drainpipe, said cup-shaped "member .being provided with a pair of apertures inthe 'bott'om open to the interiorof-the drain pipe, a ole'an 'out plug threaded into and closing one of the apertures, a swing check valvebody eXtending through :and secured in the other aperture and having a conduit opening into the interior-ofthe drain pipe-anda swing-cheek valve I normally gravity.

closing said conduit byr said shoulder and secured in position thereon,

said cup-shaped member being provided With a pair of apertures 1n the bottom, a clean-out plug secured in one aperture, a swing check valve secured in the other aperture and arrange-d to prevent Water from backing up 1 through the drain and a, drain plate mounted on the upper edge of said cup-shaped meme her and extending flush with the end of the hub.

tion.

EDWARD W. N. BOOSEY,

In testimony whereof I sign this specifica- 15 i 

